Unremarkable Form
Scarlet: It pretends to be tea, trying to fool people into drinking it so it can drain their life-force. Its ruse is generally unsuccessful.
Violet: It prefers cool, dark places, such as the back of a shelf or the space beneath a home's floorboards. It wanders in search of prey after sunset.
Masterpiece Form
Scarlet: It lives inside a superb teacup that was crafted by a potter of great renown. Collectors positively adore this Pokémon.
Violet: The more stirring it does with the tea whisk on its head, the more energy it builds up. It does this to prepare for battle.
Source:https://bulbapedia.bulbagarden.net/wiki/Sinistcha_(Pokémon)
